Case for cyclometers.



No. 638,401., Patented Dec. 5, I899.

A. F. RDCKWELL.

CASE FOR CYCLOMETERS.

(Application filed Jan. 26, 1898.

(No Model.)

//VVENTO/? E) I W ATTOHNE UNITED STATES PATENT OFFICE.

ALBERT FENIMORE ROOKlVELL, OF BRISTOL, CONNECTICUT, ASSIGNOR TO THE NEW DEPARTURE BELL COMPANY, OF SAME PLACE.

CASE FOR CYCLOMETERS.

SPECIFICATION forming part of Letters Patent No. 638,401, dated December 5, 1899.

Application filed January 26, 1898. Serial No. 667,966. (lie model.)

To all whom it may concern:

Be it known that I, ALBERT FENrMonn ROCKWELL, of Bristol, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Cases for Oyclometers; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates generally to improvements in the case or container for cyclometcrs, but does not pertain to the mechanism for manipulating the cyclometer, which may be, so far as this invention is concerned, of any appropriate construction.

The drawings illustrate a particular form of embodiment of the invention which is especially adapted for cyclometers to be used in connection with velocipedes or bicycles.

The object of my invention is to produce a case for the above-mentioned purpose which can be manufactured inexpensively, practically, and conveniently, and which at the same time will fulfil the requisites of a container for mechanism appropriate to this purpose. Among these requisites are these: The container must be light in weight, must contain an opening through which can be seen the figures upon the counting-disks, which must be protected by a transparent covering, so as to inclose the mechanism within the disk and at the same time permit the figures upon the counting-disk to be seen, and on account of the inevitable exposure must be practically air-tight to prevent intrusion of dirt, dust, and water, which would tend to interfere with the operation and injure the mechanism of the cyclometer proper.

The essence of my invention consists in the production of an inexpensively-made, but desirable, metal case and the use of the ends to inclose the same in connection with a transparent membrane, all of which will be cle-- is formed the case; and Fig. 6 is a cross-sec- 6o tional View of the shell of the case, taken at any point between the ends.

A is the metal cylindrical part of the case. 0 O are the ends adapted to be fastened into the bases of the cylindrical portion of the case, preferably by screw-threads, as represented in Fig. 1.

J is a transparent membrane of any suit able material. Sheets of celluloid of suitable thickness have been found convenient and appropriate in use.

Fig. 5 is a view in cross-section of a cylindrical metal tube before it is drawn to the requisite size for the case.

extra metal being folded into ribs or continuous loops, (represented by the letter a in said figures.) It is usual and requisite for the convenient use of an instrument of this nature to have such a rib or ribs by means of which the case may be attached to the wheel of a vehicle by means of a clamp adapted to engage the ribs and adjustable thereon. Therefore metal tubing of sufficient diameter and size,

as represented in Fig. 5, is selected, so that it may be drawn down to the requisite form and size, as illustrated in Figs. 2 and 6, the surplus metal of the tube being folded into such a rib or ribs, Fig. 2 showing two such ribs and Fig. 6 showing one rib with two edges. C03 represents the line of junction of the folded material. The tube having been reduced to the appropriate size, having the rib or ribs as described and cut to the right length, the membrane, which must be cut eX- actly the right size, is forced into the tube, the ends of the membrane butting together at J, so that the membrane shall form a lining which is an absolute fit, and thus insure against the introduction of dust or dirt. 10o

Thereupon the heads 0 O are screwed into the ends or bases of the metal cylinder. The

Fig. 3 represents the sheet of trans- 55 After drawing it 7 takes the form shown in Figs. 2 and G, the 75 membrane is out to an exact size, so that when these heads have been applied to the cycl0meter they screw up and butt against the edges of the aforesaid membrane.

9 marks the horizontal opening in the circumferential surface of the case of the usual character and which extends the en ti relength thereof, with the exception of a narrow rim at the ends.

It will thus be seen that there is supplied a cyclometer-case very light and neat in appearance, with no superfi nous parts to get out of order or become detached, one very simple and inexpensive to manufacture, one that secures the mechanism from the intrusion of dust and dirt, and one which may be made ALBERT FENIMORE ROCKWELL.

without the necessity of any extra expenditure in time or material. Having thus described my invention, what i Witnesses:

JOHN J. JENNINGS, ALICE E. BROWN. 

